✓ Flex AI
AI personal trainer that builds custom workouts and reviews your lifting form via video.
Why we recommend them
Flex AI is a mobile fitness app that generates personalized workout plans based on your training history, goals, and recovery, and lets you adjust them through natural-language chat with an AI coach called Lex. It also analyzes recorded lifts to give form feedback on things like bar path, joint position, and depth. Built for gym-goers who want data-driven programming and technique checks without a human trainer.
✓Free to download, available on iPhone and Apple Watch
✓AI form feedback analyzes lifts for depth, spine position, and joint alignment
✓Auto Progression feature adjusts weight/reps automatically based on performance
What we actually verified
8/10 TrustScore—Money-back guarantee verified
—Free trial available
✓Reachable customer service“…ocessor for third-party partners). You can contact us at: 📧 [email protected] If you are located in the European Economi”
✓No fine-print return conditions
✓No unrealistic claims detected
Vetted 2026-07-15 · How we vet →
Common questions about Flex AI
Is Flex AI legit and safe to buy from?
Yes — Flex AI passed the WhatiseBrokering.com vetting checklist (try before you buy, no fine-print returns, a real way to reach them, realistic claims only) before being listed. We remove companies that stop meeting the standard.
Can I try Flex AI before committing, or get my money back?
Every company in our directory must offer a free trial or, at minimum, a 7-day money-back guarantee from the day your product arrives — with no fine-print return conditions like "unopened" or "original packaging". Flex AI met this requirement at the time of vetting.
How do I reach Flex AI if something goes wrong?
Flex AI publishes a real customer-service contact (phone or email) — that's a listing requirement. If you can't get a response, tell us at [email protected] and we'll review their listing.
Why is Flex AI listed on WhatiseBrokering.com?
We discovered and vetted Flex AI ourselves. They don't pay us anything — they're listed purely because they meet the standard.
Had a bad experience with Flex AI?
This directory only works if every listing keeps earning its place. If Flex AI didn't live up to the standard — refused a return, unreachable support, misleading claims, anything — tell us. We'll re-review them against our vetting criteria, and if they're not abiding by our rules, we remove the listing. No exceptions, no pay-to-stay.